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Online recycling method of high-wet-strength broke

A wet-strength paper and strength technology, applied in the field of papermaking, can solve the problems of paper strength reduction, fiber loss, and inability to effectively reuse

Active Publication Date: 2020-10-23
YUEYANG FOREST & PAPER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In actual production, the wet strength agent gradually matures with the prolongation of the time of paper products off the machine, and the wet strength will continue to increase. The traditional broken paper recycling process cannot be recycled effectively, resulting in a large amount of fiber loss and causing hydraulic damage. A series of problems such as blockage of the pulper, reduction of paper strength, and shredded paper on the paper made the production unable to proceed normally

Method used

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  • Online recycling method of high-wet-strength broke

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] An online recycling method for broken paper with high wet strength, comprising the following steps:

[0029] Step 1: Add the retention aid anion CMC into the production of wet strength paper, the addition amount is 4kg / t paper;

[0030] Step 2: Collect the broken paper produced in the production process of wet strength paper, and use a dry broken paper treatment steamer with agitator for centralized treatment within 2 hours. The maximum temperature is controlled at 95°C and kept for 2 hours until the paper pieces are completely disintegrated. The concentration is controlled at 15%, and the broken paper includes dried and calendered broken paper and white paper produced during production;

[0031] Step 3: Send the side of the rewinding paper to the hydraulic pulper at the head of the paper machine for disintegration, and the disintegration time is 3 hours;

[0032] Step 4: Send the paper pieces screened out by the screening system of the paper machine directly to the fr...

Embodiment 2

[0036] An online recycling method for broken paper with high wet strength, comprising the following steps:

[0037] Step 1: Add the retention aid anion CMC into the production of wet strength paper, the addition amount is 2kg / t paper;

[0038] Step 2: Collect the broken paper produced in the production process of wet strength paper, and use a dry broken paper treatment steamer with agitator for centralized treatment within 2 hours. The maximum temperature is controlled at 98°C and kept for 4 hours until the paper pieces are completely disintegrated. The concentration is controlled at 10%, and the broken paper includes dried and calendered broken paper and white paper produced during production;

[0039] Step 3: Send the side of the rewinding paper to the hydraulic pulper at the head of the paper machine for disintegration, and the disintegration time is 5 hours;

[0040] Step 4: Send the paper pieces screened out by the paper machine screening system directly to the front slo...

Embodiment 3

[0044] An online recycling method for broken paper with high wet strength, comprising the following steps:

[0045] Step 1: Add the retention aid anion CMC into the production of wet strength paper, the addition amount is 6kg / t paper;

[0046] Step 2: Collect the broken paper produced in the production process of wet strength paper, and use a dry broken paper treatment steamer with agitator for centralized treatment within 2 hours. The maximum temperature is controlled at 90°C and kept for 3 hours until the paper pieces are completely disintegrated. The concentration is controlled at 20%, and the broken paper includes dried and calendered broken paper and white paper produced during production;

[0047] Step 3: Send the side of the rewinding paper to the hydraulic pulper at the head of the paper machine for disintegration, and the disintegration time is 4 hours;

[0048]Step 4: Send the paper pieces screened out by the paper machine screening system directly to the front slot...

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Abstract

The invention discloses an online recycling method of high-wet-strength broke, which belongs to the technical field of papermaking and comprises the following steps: step 1, adding retention aid anionCMC into wet-strength paper production; 2, collecting broke generated in the wet strength paper production process, adopting a dry broke treatment steamer with a stirrer for centralized treatment within 2 h, and carrying out heat preservation till paper scraps are completely disintegrated; 3, sending a rewound paper edge to a hydrapulper at the dry part of a paper machine for repulping; 4, conveying the paper scraps screened out by the paper machine screening system directly to a broken paper knocking front groove of the paper machine; 5, conveying the paper treated in the step 2, the step 3and the step 4 to a double-disc pulping machine in a centralized mode to be pulped to obtain a pulp; step 6, conveying the pulp treated in the step 5 to a wet strength paper production system for recycling; according to the method, the pulping fibers are recycled, waste of fiber raw materials is avoided, the paper quality index is not affected, and the water absorption and mildew resistance of thewet strength paper are enhanced.

Description

technical field [0001] The invention belongs to the technical field of papermaking, and in particular relates to an online recycling method for broken paper with high wet strength. Background technique [0002] In the production of a large number of special papers in my country, such as medical dialysis paper, wet curtain paper, map paper, laminated paper, napkin paper, paper cup paper, straw paper, etc., it is necessary to add a large amount of wet strength agent to meet the user's requirements for wet strength. And the production of this kind of products will inevitably encounter the problem of how to effectively recycle wet strength broke (especially dry broke). In actual production, the wet strength agent will gradually mature with the prolongation of the time of paper products off the machine, and the wet strength will continue to increase. The traditional broken paper recycling process cannot be recycled effectively, resulting in a large amount of fiber loss and causin...

Claims

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Application Information

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IPC IPC(8): D21C5/02D21H11/14D21H17/53D21H17/12D21H17/07D21H17/06D21H21/08D21H21/10D21H21/14D21H21/36
CPCD21C5/02D21H11/14D21H17/53D21H17/12D21H17/07D21H17/06D21H21/08D21H21/10D21H21/14D21H21/36Y02W30/64
Inventor 刘春景周金涛龙景熊刘荔
Owner YUEYANG FOREST & PAPER CO LTD
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